Easy Enzymes. Flashcards
(9 cards)
What are the five properties of enzymes?
Enzymes are proteins and proteins can be tested by using the Biuret test.
Each enzyme matches the complementary shape of a substrate.
Enzymes can be used again and again because they are unchanged in a reaction.
Enzyme are influenced by temperature.
Enzymes are influenced by pH.
What is the lock and key hypothesis/model?
The lock and key hypothesis states that the substrate fits perfectly into the active site of an enzyme
What is the active site?
A specific region of an enzyme where the substrate binds and the reaction takes place.
Define denaturation.
A permanent change in the shape of an enzyme’s active site that prevents the binding of a substrate.
Is denaturation reversible?
Denaturation is irreversible.
State the optimum temperature for enzyme activity in plants and humans.
In the human body, the optimum temperature is 37⁰C.
In plants, the optimum temperature is 28⁰C to 30⁰C.
State the optimum pH for the activity of the enzyme pepsin and amylase/trypsin.
The optimum pH for pepsin in the stomach is pH 2.0
The optimum pH for amylase and trypsin is pH 7.5
Finish the following equations: Enzymes are in CAPITAL LETTERS.
hydrogen peroxide ➡ _______ ➡ water and _______
____ ➡ AMLYLASE ➡ maltose ➡ ________ ➡ glucose.
protein ➡ ______ ➡_________➡ TRYPSIN ➡ ______ acids (proteases).
____/_____ ➡ TRIPASE ➡ fatty acids and _______
hydrogen peroxide ➡ CATALASE ➡ water and oxygen.
starch ➡ AMLYLASE ➡ maltose ➡ MALTASE ➡ glucose.
protein ➡ PEPSIN ➡ peptides ➡ TRYPSIN ➡ amino acids (proteases).
fats/lipids ➡ TRIPASE ➡ fatty acids and glycerol.
Diagrams:
Know what a pH scale looks such as what is weak/strong acid and weak/strong alkali.
